pgm9a.py

import requests
import os
from bs4 import BeautifulSoup

# Set the URL of the first XKCD comic
url = 'https://xkcd.com/1/'

# Create a folder to store the comics
if not os.path.exists('xkcd_comics'):
    os.makedirs('xkcd_comics')

# Loop through all the comics
while True:
    # Download the page content
    res = requests.get(url)
    res.raise_for_status()

    # Parse the page content using BeautifulSoup
    soup = BeautifulSoup(res.text, 'html.parser')

    # Find the URL of the comic image
    comic_elem = soup.select('#comic img')
    if comic_elem == []:
        print('Could not find comic image.')
    else:
        comic_url = 'https:' + comic_elem[0].get('src')

        # Download the comic image
        print(f'Downloading {comic_url}...')
        res = requests.get(comic_url)
        res.raise_for_status()

        # Save the comic image to the xkcd_comics folder
        image_file = open(os.path.join('xkcd_comics', os.path.basename(comic_url)), 'wb')
        for chunk in res.iter_content(100000):
            image_file.write(chunk)
        image_file.close()

    # Get the URL of the previous comic
    prev_link = soup.select('a[rel="prev"]')[0]
    if not prev_link:
        break
    url = 'https://xkcd.com' + prev_link.get('href')

print('All comics downloaded.')